basic_json::clear

void clear() noexcept;

Clears the content of a JSON value and resets it to the default value as if basic_json(value_t) would have been called with the current value type from type():

Value type	initial value
null	`null`
boolean	`false`
string	`""`
number	`0`
binary	An empty byte vector
object	`{}`
array	`[]`

Has the same effect as calling

*this = basic_json(type());

Exception safety

No-throw guarantee: this function never throws exceptions.

Complexity

Linear in the size of the JSON value.

Notes

All iterators, pointers and references related to this container are invalidated.

Example

??? example

The example below shows the effect of `clear()` to different
JSON types.

```cpp
--8<-- "examples/clear.cpp"
```

Output:

```json
--8<-- "examples/clear.output"
```

Version history

Added in version 1.0.0.
Added support for binary types in version 3.8.0.

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